Territory



(No Model.) 3 Sheets-Sheet 1. G. H. SAWYER.

TRACTION ENGINE. No'. 336,440. Patented Feb. 16, 1886.

772'??? 68866 In yenior qkmmsxs M om (No Model.) 3 Sheets-Sheet 2.

' 0. H. SAWYER. TRACTION ENGINE.

Nbpssmuo. Patented Feb. 16. 1886.

WWm

e 8 S e 1 7 d 7 3 Sheets-Sheet 3.

(No Model.)

0. H. SAWYER. TRACTION ENGINE.

No. 336,440. Patented Pb. 1-6, 1886.

min eaea UNITED ST TES CHARLES II. SAVYER,OF MAPLETON, DAKOTA TERRITORY, ASSIGNOR TO THE SA\VYER STEAM PLOV COMPANY, OF SAME PLA( E.

TRACTION-ENGINE;

SPECIFICATION forming part of Letters Patent No. 336,440, dated February 16, 18 86.

Application filed June 11, 1885. Serial No. 168,438. (No model.)

To all whom it may concern Be it known that I, CHARLES H. SAWYER,

a citizen of the United States, residing'at Mapleton, in the county of Cass and Territory of Dakota, have invented certain Improvements in Traction-Engines, of which the following is a specification. r

My invention relates to improvements in engines designed for farm and road purposes;

struction and in the combination of devices hereinafter described, and particularly pointed out in the claims.

In the drawings, Figure 1 is a side elevation of an engine embodying my invention. 2 Fig. 2 is a plan view of the same with the drum in section. Fig.3 is a vertical crosssection ofthe boiler on line a: w of Fig.8. Fig. 4 is a detail of one of the engines. Fig; 5 is a partial elevation and partial section of 0 the forward axle or shaft of the carriage and the mech'anism connected thereby. Figs. 6 and 7 are details. Fig. Sis a side elevation of the boiler.

A A represent the drum, which preferably '15 consists of two similar sections joined together I at their edges, so that each may turn independently of the other. The drum may be composed of wood, having metal bands or hoops a a extending around it, or it may be 40 composed of iron or steel. A band, a, is secured to one of the sections, and forms a flange projecting over the joint between the.

sections. A plate, a, is secured under this flange to the opposite section, to ta kethe Wear between the parts when the drumls-composed of wood, and another plate, a, is secured to the edge of one of the sections for asimilar purpose. 'A rail, a", is secured to the inner slde of one section, and a band, a, secured to the 5o opposite section, projects over this rail and carries friction-rollers a that bear against the rail a The sections are thus held together,

My invention consists, generally, in an err-- on the head of the boiler.

while each is in its movement independent of the other. ()thersuitable means may be used, however, for holding the sections together. within each section of the drum is a trackrail, a, and a rack, a. The parts a a may be formed integrally, or they may be formed separately and secured within the drum by any suitable means. Arranged within the drum and resting on the rails a is a carriage formed of the two side bars, B B, a front axle, B", a rear axle, B", two front wheels, B, and two rear wheels, 13". The forward wheels,

13, have a gear, B", preferably formed integrally with them and meshing with the rack a. The boiler, engines, tank, and other parts of the machine are mounted on and supported by this carriage, which is supported within and brings all of the weight of these parts upon the drum itself.

0 represents the boiler, which is preferably of the construction hereinafter described. It is secured to heads 0', carried by frames 0',

,which are supported on the side bars of the carriage, as hereinafter described. The.

frames 0 have each a: hollow trunnion, a, formed thereon, and these truunions are mounted in boxes in the side bars, B, of the carriage. The engines E are mounted on the heads 0, and hence the boiler and engines are by means of the frame and trunnions hun'g pivotally on the carriage.

Here the crank-shafts of thr engines. These shafts pass through the trunnions c and have the pinions d on their outer ends. The piston-rod E (see Fig. 4) is connected by four.

rods, E, witha slide,"E, that moves in ways The crauk-shaftD passes between the rods E, and the crank is located between said rods. A pitman, E, arranged between the rods,connects the crank D and slide E. By this construction and arrangement I am enabled to bring the parts of the engine into small space, and to centrally locate the crankshaft, for a purpose hereinafter stated. The forward axle, B, carries at one end the gear-wheel b and atthe opposite end the pinion b. (Se'eFig. 5.) A pinion,

6, carried by a stud; b, meshes with the pinion b.- A cap, 5, covers the. pinions b and b and afiords an outer bearing for the stud b.

A gear, b is secured to the stud b, and it is preferably of the cap shape shown, thereby covering the cap b. The pinions on the crankshafts are connected by the link-belts E with the gears b and b and through this means the forward axle is rotated from said engines. By using the intermediate pinions on one sideI am enabled to run one engine in one direction and the otherin the other, and thereby to neutralize the strain that would otherwise come on the boiler and carriage. The front wheels, B are mounted loosely upon the axle B, and are secured each to a, sleeve, F, carrying a face gear, F. The axle B has a collar or hub, F rigidly secured thereto and projecting between the gears F F. Mounted radially in the hub F are' one or more, preferablv tbur, pinions, f, meshing with the gears F.

Projecting outwardly from the side burs,B, of the carriagearethe studs I), having balls 5 upon their ends.

H are bars secu red by sockets to the balls 2;". making a half-socket in the end of the bar and a half -socket in a cap that is secured to the end of the bar by suitable screws or bolts.- A triangular frame, 1, arranged back of the drum, is secured to the bars H by hingejoinis h. At the rear angle'of the frame I a verticle tube, 1, is secured by suitable braces. A rod, 1', havirg a crotch at its lower end in which is journaled a wheel, 1 passes through the tube 1 f1 ame I. A gearscgment, 2 is arranged on the upper end of the rod lfland a worm-shaft, i, mounted on the tube and supplied with handles 2', meshes with this segment. A seat, I, is arranged on the tube 1, so that a person seated thereon may operate the W01 1 qrshaft and guide the engine. Y The wheel 1 is provided with a-flange that cuts into the ground, and thereby aids in directing the engine. A brak eshoe-li, is secured to the-bar H upon each side of the drum, so that by turning the guide-wheel in one direction the .frame I will be moved in that direction, and the shoe upon the other side of the drum brought against the edge of the drum. The rear axle, 13*, projects beyond the side bars, B B, of the carriage, as shown in Fig. 2, and the inner sides of the bars Hare formed with curved grooves h, formed by projecting lug's h, into which the ends of the axle B extend. A series of holes extend laterally through the-lugs h, and are adapted to receive the cross-pins h. Vhenthese pins are not in position, the carriage is held to the track inside the drum only by its own gravity, and its forward end tends to be raised by the action of the gears on the rack-bar of the drum. The weight of the tank and carriage will .ordinarily be sufficient to hold down the forward end of the carriage; but should there be any obstruction in the'path of the drum the pins it may be inserted and the carriage and frame i. will be nigidly connect-ed, and the whole will then act as a three-wheeled carriage, and the rear support, formed by the wheel at the rear end of the triangular'frame, prevents the forward end of the carriage from rising.

The sockets are preferably formed byand supports the-rear end of the The construction of the boiler is shown in Figs. 2, 3, and 8. This boiler consists of a cylindrical shell, 0, supported by the heads 0 and frames 0', as described. lVithin the shellv O is a substantially semicylindrical drum, C extending substantially the full length of the boiler-shell, and provided with two doors, G", opening through the boiler-shell. A second drum; 0, extends through the'boilershell above the back side of the drum 0, to which it is connected by several fines, 0 .,A man-hole, 0", through the boiler-shell ope is into the upper drum for convenience in put ting in or getting to the tubes. drum has one vertical side, which forms the rear tube-sheet, receiving the ends of a series of tubes, 0", that extend across the lowerdrum transversely in the boiler-shell, and have their opposite ends seated in the shell of the boiler. A breeching, 0 covers the ends of the fines and communicates with the Smokestack G, that extends horizontally over the top of the boiler, and then vertically above the top of the drum, as shown in Fig. 1.. I

K is the fire-grate in the lower part of drum C extending nearly the full length thereof, and having a dead plate in the center, as indicated in Fig. 8.

A platform, L, Figs. 1 and 2, is supported on the rear axle of thecarriage, below the doors of the furnace, ing the furnace.

The engines are each provided with a linkmovement, M, in connection with its slide-- valve, for reversing theengine. These reversing devices are each connected to a walking-beam, N, Figs. 7 and 8, that is pivoted at its center a, and provided with a suitable handle, N. By operating the handle Is and rod or walking -bcam N each engine is reversed, and each will run in a direction opposite to the other, as before.

In order that the drive-chains or link-belts E may not have any slack in them when the engines are in operation, I mount the boxes 0 (see Fig. 6,) in which the trunnionsc of frame 0 and the crank-shafts are supported, in slots B in the side bars of the carriage,and provide adjusting-screws S S for such boxes. When the drive-chains are to be put on,'tlie boxes may be moved toward the forward axle of the carriage, and moved back again to take. up the slack in the chains after they are in position.

In using this as a road or farm engine both of the drivingengines may be continuously operated at the same rate of speed, and the movement of each continuously applied to the forward axle of the carriage. As long as the traction on each section of the drum is. the same, both of the facegears will be rotated by the small gears f in the hub on the axle at the same rate of speed and the same speed will be given to the sections of the drum. When, however, there is a greater traction or resistance to the movement of one section of the drum, the face-gear of that section will be rotated at a slower rate. the small gear rolling The upper to form a supportin feed- IIC over said face-gear, and that section of the ylrnm will consequently move ataslower speed. This principlein the operation of the described gearing is taken advantage of in the applica- 5 tion ofthe brake mechanism. Applying the brake to either drum-section, even while the engines are both rotating at full speed, brings a greater resistance on such section, and consequently causes, through the operation of the gearing above described, such section to move at a slower speed, and thereby guides the drum to the right or left, as desired.

It will be seen that while I use two engines I do not use one engine for operating each section, but that both engines together operate. to revolve the axle or shaft 13', and that by the hub and face-gears the movement of said shaft is communicated to the drumsec' tions. It will therefore be seen that a single engine operating the axle Bmay be employed without departing from myinvention. fer, however, to use tlietwo engines, as described.

\Vhen this engine is used as a traction or road engine, the plows, vehicle, or whatever it is desired to draw, may be attached to the frame I by any suitable means.

A shaft, 0, may be secured to the frame I and provided with belt-pulleys O 0, when it gine for operating thrashing or other machines. The drive-chains will then be disconnected and the crank-shafts connected construction herein shown and described, as the same may be varied in many particulars without departing from my invention. '5 I do not in this application claim the construction of the boiler or the described improvements in the steam-engines, but reserve the right to claim the same in separate applications to be filed as divisions hereof; but

What I claim as my invention is I 1. The combination of th-e'traetiou-drum, the carriage arranged therein, the engines, drive-gearing connecting said engines with thedrum, a frame, I, arranged in the rear of said drum, bars H, loosely connecting said frame with the carriage, and guiding meansarranged on said frame,as and for the purpose set forth. 2. The combination of the sectional drum I preas described.

is desired to use the engine asastationary en-- I do not limit myself to the exact details of and means for operating the same, as and for pose set forth.

'for driving the same, of the frame 1, tube 1,

rod. 1 wheel 1 gear-segment i,worm-shaft i, and handles 2', as and for the purpose set forth.

5. Theconibinatiomwith the sectional drum A A, having racks a, of the shaft or axle B', having hub F,with pinions f, mounted therein, the sleeves F, having gears F, the gears- B meshing with racks a, and means for driving the shaft B, as and for the purpose set.

forth.,

6. The combinatiornwith the'drum and carriage arranged therein, of theboilerhaving 5 heads 0 and frame G, mounted on trnnnions in said carriage, and the driving --en gines mounted on said heads 0, and means connecting said engines with the drum, substantially 7. The combination, with the carriage, of the. boiler having heads 0 and frame 0*, mounted by hollow-trunnions'on the carriage, of the engines supported on said heads and having their crank-shafts passing through-said trnnnions, as and for the purpose set forth.

8. The combination, with the carriage having slots B", of the boiler having trunnions 0,

boxes G", and adjusting'screws S S, as and for the purpose set forth.

V 9. The eombinatiomwith the drum and carriage, of the bars H, connected to the'carriage by the ball-and'socket joints, the frame I, joined to said bars H, and the guide-wheel,

10 the purpose set forth. x 5

10. The combination,with the sectional tra'ction-drum, of a carriage mounted therein, engines pivotally mounted on said carriage, and means connecting said engine with said drum 1 10 for driving the latter, as and for the purpose set forth.

11. The sectional drum having its sections ,united at the edges, with each section free to revolve independently of the other'in combination with the carriage resting on the interior of said drum, the engines mounted on said carriage, and drivingmeans connecting said engines with said drum, as and for the pur- CHARLES H. SAWYER. In presence of-- GEO. MoNEIR,

AMASA 0. PAUL. 

